What is the rare ALS disease that caused actor Eric Dane's death?

American actor Eric Dane died on February 19, 2026, at 53, after battling ALS. The Grey's Anatomy and Euphoria star had revealed his diagnosis last year. ALS is a rare, terminal neurodegenerative disease that causes progressive muscle weakness and loss of control. The exact cause of ALS remains unknown in most cases, although a small percentage of cases are inherited.